Triphenylphosphine (3.9 g, 14.8 mmoles) was placed into a 300
mL round bottom flask, equipped with a condenser which was cooled
with tap water. Dry benzene (100 mL) (distilled over
sodium/benzophenone) was cannulated into the reaction vessel, and
a positive pressure of argon and magnetic stirring were maintained
throughout the reaction sequence.
Cyclopropylmethyl bromide (2.0 g, 14.8 mmoles) was added to
the solution via syringe. The reaction mixture was heated at reflux
for 10 days producing insoluble cyclopropylmethyltriphenylphosphonium bromide.
